Lock.



D. G. PUGHELY.

LOCK.

APPLKCATION FILED NOV. 9. 1914.

1,165,627. Patented Dec. 28, 1915.

DANIEL G. PUGHELY, OF- HAILEYVIL-LE, OKLAHOMA.

LOCK.

Specification of Letters Patent.

Patented Dec. 28, 1915.

Application filed November 9, 1914. Serial No. 871,137.

To all whom it may concern:

' Be it known that I, DANIEL G. PUGHELY, a citizen of the United States, residing at Haileyville, in the county of Pittsburg and State of Oklahoma, have invented certain new and useful Improvements inLocks, of which the following is a specification, reference being had to the accompanying drawings.

My invention relates to looks, and par ticularly to that form of lock in which a tumbler is used for holding a bolt in its projected position, the key acting upon the tumbler to release it to permit the boltto'be retracted.

The primary object-of my invention is the provision sofa lock of this character so formed that in order to release the tumbler from its engagement with the bolt and thereby permit the retraction of the bolt,

the key must be forced into a difierent plane from that in whichit was located, in order to shift the bolt to its retracted position.

A further object of the invention is so to form a lock of the character described that the key not only has to be shifted to a different plane in order to release the tumbler, but'to provide that the key must pass a ward plate before it can be brought into a plane to engage the tumbler.

Other objects will appear in the course of the following description.

My invention is illustrated in the accompanying drawing, wherein Figure l is a face view looking from the inside of the lock, the tumblerb'eing partly broken away; Fig.2 is a vertical section on the line 22 of Fig. 1. V

Corresponding and like parts are referred to in the following descriptionand designated in all drawing by like reference numerals Referring to these figures 2 designates a look casing which is preferably rectangular in form and may be of any ordinary construction. Disposed within the casing and projecting through a slot in the end wall thereof is a bolt 3, the head of which carries a rearwardly projecting shank 4 which is longitudinally slotted as at 5. The bolt is slidably mounted upon a stud 6 which projects from the front wall of the lock casing and through the slot 5, the bolt being held in engagement with the stud 6 by means of a transverse pin 7 bearing; upon the inner face of the bolt.

parts of the accompanying The bolt is shifted into a retracted position by means of a spring 8 whose upper end engages a pin 10 projecting from the rear end of the bolt shank, the lower end of the spring being wound around the pin or stud 9 projecting inward from the face of the casing 2. The rear edge of the head of the bolt is formed with a curved shoulder 11 which extends upward from the lower edge of the bolt head to the lower edge of the bolt shank, and midway between this shoulder l1 and the rear end of the bolt shank there is provided the downwardly extending tooth 12 whose opposite side edges are divergently curved or angled.

The front wall of the bolt casing is formed with a key hole 2 having a shape adapted to fit the bit of the key used, and disposed opposite the front wall of the casing and on a plane just inside of the inner face of the bolt shank there is disposed the ward plate 13 which may carry the usual curved wards upon its inside face (which wards are not numbered, as they are common in the art), and which is formed with a key hole slot 14 which also fits the shape of the key bit. It will be seen that this key hole slot 1% extends at an angle to the key hole slot formed upon the outer face of the casing so that the key inserted through the first slot or key hole in the face of the lock will not be forced rearward without turning to pass through the key hole slot 14.

Mounted above the bolt and coacting therewith is a tumber 15, the body of which is in the form of a plate having a width equal to the depth of the casing 2. The extremity of V the'plate at its inside margin is extended to form a finger 17 which eXtends downward, is then curved as at 18 toward the pivotal point of the tumbler plate, and then upward. Disposed in line with the base of this finger and extending across the free extremity of the tumbler plate is a tooth 19 formed by bending down the edge of the tumbler plate. The tumbler is rotatably mounted upon a pin 16 projecting out from the front wall of the casing and is freely movable vertically around the pivot. A spring 21 of any suitable form is disposed above the tumbler plate and urges it downward. As shown, this spring has two divergent leaves, and is conveniently mounted from the drawing. In order to project the bolt, assuming that the bolt is retracted,

the key 23 is placed in the key hole in the front plate and rotated until the curved edge of the bit 24 engages with the shoulder 1 on the bolt. This causes the projection of the bolt against the force of the spring 8. When the bolt has been projected a suflicient distance to permit the key bit to escape from the shoulder 11, the bolt 19 on the tumbler will engage with one of the teeth 20 holding the bolt projected. In order to causethe retraction of the bolt by means of the spring 8 the tumbler must be lifted from its engagement with the teeth 20, and to this end the key must be inserted through the key hole if to the inner side of the ward plate 1.3. If now the key be rotated in either direction, the rounded end of the key bit will engage with the rounded end face of the tumbler, the tumbler will be lifted and the bolt will be retracted. If an attempt be made to retract the key by reversing the movement of the key, the end of the key bit will strike the downwardly projecting tooth or lug 12 and the key will be prevented from further rotation in this direction. If the key may be rotated freely in a reverse direction, it would be obvious to anyone attempting to retract the bolt that the bolt had been locked in a projected position by means other than the key itself, and an attempt would be made to discover what this extraneous means was, which might lead to the discovery of the tumbler and the 1nanner in which it was operated. Inasmuch, however, as the key meets with no resistance in its reverse movement, the party attempting to retract the bolt without knowing anything of the tumbler mechanism will believe that the faultlies in the key and will not have his attention called to the fact that a tumbler mechanism is used. It will be seen that no device can be inserted upward through the front key hole to force the tumbler out of its engagement with the bolt inasmuch as the distance between the front face plate and the ward plate is only slightly greater than the thickness of the bolt, therefore the shank of the bolt will be interposed between any upwardly inserted implement and the tumbler. By having a plurality ofnotches or teeth 20 formed upon the upper edge of the bolt shank, I provide for the bolt being projected to a greater or less extent by using a key having a greater or less length of bit.

Having described my invention, what I claim is 1. In a lock, a bolt, a casing including a front plate having akey slot, a ward plate having a key slot and disposed inward of and in spaced relation to the front plate,- means for retracting the bolt, and a key actuated tumbler adapted to hold the bolt in projected position, the tumbler having a bolt engaging portion disposed in the plane of the bolt and a single key engaging'portion disposed entirely in a plane inward of the plane of the bolt, and inward of the plane of said ward plate, said bolt having a key engaging portion disposed outward of the plane of the key engaging portion of the tumbler and outward of the plane of said ward plate. i

2, Ina lock, a casing having a front plate provided with a key slot, a ward plate disposed inward and in spaced relation to the front plate and also having a key slot, a bolt disposed in a plane between the plane of the front plate and the plane of the ward plate, a spring urging the bolt to a predetermined position, and a tumbler having a bolt engaging portion disposed in the plane of the bolt and outward of said ward plate, and a single key engaging member carried by said tumbler and disposed entirely inward of the plane of the inner face of the ward plate, whereby to provide for an actuation of the bolt when the key-bit is disposed in one plane and an actuation'of the tumbler when the key-bit is disposed in. another plane. 7 V V 3. In a look, a casing, a bolt movable therein and having a shank and a head, the rear edge of the head being formed to provide a shoulder engageable by a' key, the upper edge of the bolt being formed with a plurality of notches, a springurging the bolt to retracted position,a tumbler mounted above the bolt and having a tooth adapted to engage in any one of said notches, said tumbler having a single downwardly extended key engaging portion on its inner margin disposed entirely inward of the bolt, and a ward plate disposed between the inside face of the bolt and the adjacent face of the key engaging portion of said tumbler, said ward plate being formed with a key opening.

f. In a look, a casing having a key opening in its face plate, a bolt shiftably mounted in the casing, a spring urging the bolt to retracted position, said bolt having a downwardly extending shoulder adapted to be engaged by a key to project the bolt and having upon its upper edge a plurality of notches, a ward plate disposed slightly inward of the bolt and having a key slot disposed at an angle to the slot in the face plate, and a tumbler pivotally supported above the bolt having its forward edge formed with a tooth to engage the teeth on the bolt, having its side margin formed with a single depending key engaging portion disposed entirely in a plane inward ofthe ward plate and adapted to be engaged by a key insertedto passthe ward plate.

5. In a look, a casing, including a'front plate having a key hole, a bolt movable in the casing and having a shankand a head, i

the bolt being formed to'provide a shoulder 130 loo engageable by a key, one edge of the bolt having a notch, a spring urging the bolt to retracted position, a tumbler mounted adjacent the bolt and having a tooth adapted to engage in said notch, said tumbler having a single key engaging portion on the margin farthest away from the bolt and disposed en tirely inward of but in a plane parallel to the plane of the bolt, and a ward plate disposed in a plane between the key engaging portion of the tumbler and the adjacent face of the bolt and formed with a key opening.

6. In a lock, a casing including a plate having a key hole, a bolt movable within the casing and having a shank and a head and being formed to provide a shoulder engageable by a key and to provide a lug also engageable by a key and spaced from the shoulder, one edge of the bolt being formed with a plurality of notches, a spring urging the bolt to retracted position, a tumbler mounted adjacent the bolt having a tooth adapted to engage in any one of said notches, said tumbler having a single key engaging portion on its margin farthest away from the bolt and extending downwardly parallel to the side face of the shank and adapted to be engaged by a key whose bit is inserted beyond the plane of the bolt, and a ward plate disposed between the front plate of the casing and the key engaging portion of the tumbler and having a key hole disposed in angular relation to the key hole opening in the front plate.

7. In a look, a bolt having a key engaging portion, a tumbler, the latter having a single key engaging portion disposed entirely in a plane spaced from the plane of the keyv DAN G. PUGHELY.

Witnesses RUTH BARTLETT, PETE FoHLETTE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, 1). C. 

